| Patents for Louis W. Gratz |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 681,391 | Aug. 27, 1901 | J.B. Fenner | Muffler for Gas or Other Engines | mufflers |
| 705,596 | Jul. 29, 1902 | J.G. Morith | Pipe Wrench | pipe wrenches |
| 706,916 | Aug. 12, 1902 | J.B. Fenner | Fuel Valve for Gas Engines | internal combustion engine valves |
| 757,064 | Apr. 12, 1904 | H.J. Smith | Electric Igniter for Gas Engines | ignition systems |
| 801,927 | Oct. 17, 1905 | H.J. Smith | Fuel Mixing Device for Gas Engines | carburetors |
| 805,000 | Nov. 21, 1905 | W.E. Blair | Driving Mechanism for two Pump-Plungers | fuel pumps |
| 818,714 | Apr. 24, 1906 | H.J. Smith | Valve Mechanism for Gas Engines | internal combustion engine valves |
| 829,166 | Aug. 21, 1906 | C.W. Manzel | Lubricator | tool lubricators |
| 832,265 | Oct. 02, 1906 | C.W. Manzel | Lubricating Device | tool lubricators |
| 844,157 | Feb. 12, 1907 | L.R. Loughborough | Drafting Instrument | squares |
| 920,769 | May 04, 1909 | C.W. Manzel | Lubricator | tool lubricators |
| 936,898 | Oct. 12, 1909 | C. Holly | Looping Machine | book binder |
| 1,003,189 | Sep. 12, 1911 | C.W. Manzel | Lubricator | tool lubricators |
